package com.hmdp.interceptor;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_USER_KEY;

@Slf4j
public class RefreshTokenInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取session
//        1.获取请求头中的token
        String token = request.getHeader("authorization");
        log.info("token:{}",token);
//        不存在  拦截
        if(StrUtil.isBlank(token)){
            return true;
        }
//        HttpSession session = request.getSession();
        //2.获取session中的用户
//        基于token获取redis的用户2
//        Object user = session.getAttribute("user");
        Map userMap = stringRedisTemplate.opsForHash().entries(LOGIN_USER_KEY + token);
        //3.判断用户是否存在
        if(userMap.isEmpty()){
            return true;
        }
//        5.将查询到的hash数据转为UserDTO对象
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);


        //6.存在，保存用户信息到Threadlocal
        UserHolder.saveUser(userDTO);
//        7刷新token有效值
        stringRedisTemplate.expire(LOGIN_USER_KEY+token,30L, TimeUnit.MINUTES);
        //8.放行
        return true;
    }
}
